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Investments (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 USD ($) engine aircraft | Dec. 31, 2017 USD ($) engine | Dec. 31, 2016 USD ($) | Jun. 03, 2014
Investments |  |  |  |
Net book value of equipment held for operating lease | $ 1,673,135 | $ 1,342,571 |  |
Ownership interest (as a percent) | 50.00% |  |  |
Investment in WMES joint ventures at beginning of the period | $ 50,641 | 45,406 | $ 41,295 |
Investment |  |  | 5,545 |
Earnings (losses) from joint venture | 3,800 | 7,158 | 1,813 |
Deferred gain on engine sale |  | (939) | (1,212) |
Distribution | (5,730) | (1,880) | (1,167) |
Foreign Currency Translation Adjustment | (770) | (896) | (868) |
Investment in WMES joint ventures at end of the period | 47,941 | 50,641 | 45,406 |
Revenue | 87,009 | 80,189 | 57,091 |
Other revenue | $ 7,644 | 7,930 | 9,023 |
WMES |  |  |  |
Investments |  |  |  |
Number of engines in lease portfolio | engine | 32 |  |  |
Number of aircraft in lease portfolio | aircraft | 1 |  |  |
Net book value of equipment held for operating lease | $ 234,800 |  |  |
Ownership interest (as a percent) | 100.00% |  |  |
Investment in WMES joint ventures at beginning of the period | $ 36,014 | 32,470 | 27,272 |
Investment |  |  | 5,545 |
Earnings (losses) from joint venture | 3,899 | 5,867 | 2,032 |
Deferred gain on engine sale |  | (443) | (1,212) |
Distribution | (5,730) | (1,880) | (1,167) |
Investment in WMES joint ventures at end of the period | $ 34,183 | $ 36,014 | 32,470 |
Number of engines sold to third party | engine | 2 | 2 |  |
Proceeds from sale of engine |  | $ 14,800 |  |
Consolidated Statements of Income |  |  |  |
Revenue | $ 38,465 | 40,211 | 35,463 |
Expenses | 30,934 | 28,754 | 31,669 |
WMES net income | 7,531 | 11,457 | 3,794 |
Consolidated Balance Sheets |  |  |  |
Total assets | 274,744 | 246,309 |  |
Total liabilities | 198,534 | 165,228 |  |
Total WMES net equity | 76,210 | 81,081 |  |
WMES | Other Revenue [Member] |  |  |  |
Investments |  |  |  |
Revenue | $ 2,600 | $ 2,400 | $ 2,100 |
Type of Revenue [Extensible List] | us-gaap:AssetManagement1Member | us-gaap:AssetManagement1Member | us-gaap:AssetManagement1Member |
CASC Willis |  |  |  |
Investments |  |  |  |
Number of engines in lease portfolio | engine | 4 |  |  |
Net book value of equipment held for operating lease | $ 51,900 |  |  |
Investment in WMES joint ventures at beginning of the period | 14,627 | $ 12,936 | $ 14,023 |
Earnings (losses) from joint venture | (99) | 1,291 | (219) |
Deferred gain on engine sale |  | (496) |  |
Foreign Currency Translation Adjustment | (770) | (896) | (868) |
Investment in WMES joint ventures at end of the period | $ 13,758 | $ 14,627 | $ 12,936 |
Number of engines sold to third party | engine |  | 1 |  |
Proceeds from sale of engine |  | $ 11,200 |  |
CASC Willis Engine Lease Company Limited |  |  |  |
Investments |  |  |  |
Ownership interest (as a percent) |  |  |  | 50.00%

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